DTTracoLUTs Class Reference

#include <DTTracoLUTs.h>

Public Member Functions
	DTTracoLUTs (std::string filename)
	constructor More...
unsigned short int	getBendAng (int pos, int ang, int qualflag) const
	return bending angle from pos and ang More...
unsigned short int	getPhiRad (int pos, int qualflag) const
	get radial angle from traco position and flag: 0=outer, 1=inner, 2=correl. More...
unsigned short int	getPsi (int ang) const
	get psi angle from traco k parameter More...
int	load ()
	load look-up tables More...
void	print () const
	print look-up tables More...
void	reset ()
	reset look-up tables More...
int	size_phiLUT (int i) const
int	size_psiLUT () const
	return number of entries in the LUT More...
virtual	~DTTracoLUTs ()
	destructor More...

Private Attributes
std::string	_testfile
LUT	phi_lut [3]
LUT	psi_lut

Detailed Description

Look-up tables for traco angle and position

Author

S. Vanini - INFN Padova

Definition at line 34 of file DTTracoLUTs.h.

Constructor & Destructor Documentation

DTTracoLUTs::DTTracoLUTs

(

std::string

filename

)

constructor

Definition at line 45 of file DTTracoLUTs.cc.

                                       :
            _testfile(testfile) {
}

DTTracoLUTs::~DTTracoLUTs ( )

virtual

destructor

Definition at line 54 of file DTTracoLUTs.cc.

References hitfit::clear(), relval_steps::k, phi_lut, and psi_lut.

                          {

  psi_lut.clear();
  for(int k=0;k<3;k++)
    phi_lut[k].clear();
}

Member Function Documentation

unsigned short int DTTracoLUTs::getBendAng	(	int	pos,
		int	ang,
		int	qualflag
	)		const

return bending angle from pos and ang

Definition at line 182 of file DTTracoLUTs.cc.

References phi_lut, and psi_lut.

                                                                           {
  // bendAng = psi - phi  : psi ha risoluzione 12, phi 9, quindi devo riportarli alla
  // stessa risoluzione con : phi/8 (scarto i 3 bit meno significativi). 
  // Il risultato ha risoluzione 10 bits. 
  unsigned short int BendAng = ( (psi_lut)[ang+512] - ((phi_lut[flag])[pos]/8) ) & 0x3FF;    //10 bits
   
  //cout << "Bending angle is:" << hex << BendAng << endl; 
  //cout << "Abs of bending angle is:" << hex << abs(BendAng) << endl; 


  return BendAng;
}

unsigned short int DTTracoLUTs::getPhiRad	(	int	pos,
		int	qualflag
	)		const

get radial angle from traco position and flag: 0=outer, 1=inner, 2=correl.

Definition at line 150 of file DTTracoLUTs.cc.

References phi, and phi_lut.

                                                                {
  unsigned short int phi = (phi_lut[flag])[pos]  &  0xFFF;     //12 bits
  //int sgn = (phi_lut[flag])[pos]  &  0x800;     //bit 12 for sign
  //if(sgn)
    //phi = - phi;

  return phi;
}

unsigned short int DTTracoLUTs::getPsi

(

int

ang

)

const

get psi angle from traco k parameter

Definition at line 162 of file DTTracoLUTs.cc.

References psi_lut.

                                                    {

  unsigned short int ipsi = (psi_lut)[ang+512]; //scritto in complemento a due 
/*
  //debug: try with formula
  float fpsi = atan( ((float)(ang) * 4.2) /(18 * 1.3 * 30 ));
  fpsi*=512;
  if(fpsi<=0)fpsi-=1.0;
  int ipsi = (int)fpsi;
  // if outside range set to lower edge
  if( ipsi>= 512 ||
      ipsi< -512 ) ipsi=-512;
cout << "psi is="<<ipsi <<endl;
*/
   return ipsi;
}

int DTTracoLUTs::load

(

)

load look-up tables

Definition at line 80 of file DTTracoLUTs.cc.

References _testfile, DTTPGLutFile::close(), h, DTTPGLutFile::open(), phi, phi_lut, psi_lut, DTTPGLutFile::readHex(), and y.

                      {

  // get file name in current directory
  string ang_file = _testfile + ".anglut";
  string pos_file = _testfile + ".poslut";
 
  // open file for PSI 
  DTTPGLutFile filePSI(ang_file);
  if ( filePSI.open() != 0 ) return -1;

  // ignore comment lines 
  //filePSI.ignoreLines(14);

  // read file for PSI values --->   psi is 10 bits, 9+sign(10,11...16), resolution 9 bits, 
  for(int u=0;u<1024;u++){
      int word  = filePSI.readHex();  //read a 16 bits word
      //int psi = word & 0x01FF;    //bits  0,1,...8
      //int sgn = word & 0x0200;    //bit 9
      //if(sgn)
        //psi = -psi;
      psi_lut.push_back(word);      //positive value
  }
  filePSI.close();
 
  // open file for PHI 
  DTTPGLutFile filePHI(pos_file);
  if ( filePHI.open() != 0 ) return -1;

  // read file for PHI values    --->  phi is 12 bits, 11+sign(12..16), resolution 12 bits
  for(int y=0;y<3;y++){     //3 series of values: I-outer, II-innner, III-correlated
    for(int h=0;h<512;h++){
        int phi  = filePHI.readHex();
        //phi &= 0x0FFF;                //get 12 bits
        //int sgn = phi;
        //sgn >> 11;                    //bit 12 for sign
        //sgn &= 0x01;
        //if(sgn==1)                    //negative value
          //phi = -phi;
        phi_lut[y].push_back(phi);  //positive value
    }
  } 
  filePHI.close();
  return 0;
}

void DTTracoLUTs::print

(

void

)

const

print look-up tables

Definition at line 129 of file DTTracoLUTs.cc.

References gather_cfg::cout, TauDecayModes::dec, contentValuesFiles::m, phi_lut, psi_lut, and x.

                              {

  cout << endl;
  cout << "L1 barrel Traco look-up tables :" << endl;
  cout << "====================================================" << endl;
  cout << endl;

//  int i = 0;
  //  for debugging
  for(int x=0;x<1024;x++)
    cout << "K=" << x << " ---> " << hex << psi_lut[x] << dec << endl;
  for(int m=0;m<512;m++)
    cout << "X=" << m << " ---> " << hex << (phi_lut[0])[m] << "  " 
                                  << (phi_lut[1])[m] << "  " 
                          << (phi_lut[2])[m] << "  " << dec << endl; 

}

void DTTracoLUTs::reset

(

void

)

reset look-up tables

Definition at line 69 of file DTTracoLUTs.cc.

References hitfit::clear(), relval_steps::k, phi_lut, and psi_lut.

                        {

  psi_lut.clear();
  for(int k=0;k<3;k++)
    phi_lut[k].clear();
}

int DTTracoLUTs::size_phiLUT ( int  i ) const

inline

Definition at line 65 of file DTTracoLUTs.h.

References i, and phi_lut.

{ return phi_lut[i].size(); }

int DTTracoLUTs::size_psiLUT ( ) const

inline

return number of entries in the LUT

Definition at line 64 of file DTTracoLUTs.h.

References psi_lut.

{ return psi_lut.size(); }

Member Data Documentation

std::string DTTracoLUTs::_testfile

private

Definition at line 71 of file DTTracoLUTs.h.

Referenced by load().

LUT DTTracoLUTs::phi_lut[3]

private

Definition at line 69 of file DTTracoLUTs.h.

Referenced by getBendAng(), getPhiRad(), load(), print(), reset(), size_phiLUT(), and ~DTTracoLUTs().

LUT DTTracoLUTs::psi_lut

private

Definition at line 70 of file DTTracoLUTs.h.

Referenced by getBendAng(), getPsi(), load(), print(), reset(), size_psiLUT(), and ~DTTracoLUTs().